It's an HDR picture. Started out with the usual three exposures, -2, normal, +2. Used Photomatix to combine them and then Photoshop CC to tune it up.
Great church on Santorini in the village of Megalochori. It's even got a couple of flying buttresses if you look closely. This is very close to what came out of the camera. All that's been done in Photoshop is to put a bit more detail in the shadows and darken the sky a bit.
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